Some may recognize a certain song upon reading the message within this piece.

In that song, a woman makes up her mind to disappear somewhere leaving him behind.
She leaves behind a single, brief message, choosing a path from which she will never return.
Yet, the song never reveals what those words were.

This artwork gently brings forth the hidden words left behind.

Adios, don't look back！

Amidst a cityscape blurred by lights and bathed in red,
she stands, as if trying to say something.

From the hidden words, you must give this artwork its title.